iommu/amd: Fix hotplug with iommu=pt

This did not work because devices are not put into the
pt_domain. Fix this.

Cc: stable@vger.kernel.org
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>

1 files changed, 13 insertions, 4 deletions

diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 625626391f2d..3f365ab9f7c7 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -2254,6 +2254,18 @@ static int device_change_notifier(struct notifier_block *nb,
 
                 iommu_init_device(dev);
 
+                /*
+                 * dev_data is still NULL and
+                 * got initialized in iommu_init_device
+                 */
+                dev_data = get_dev_data(dev);
+
+                if (iommu_pass_through || dev_data->iommu_v2) {
+                        dev_data->passthrough = true;
+                        attach_device(dev, pt_domain);
+                        break;
+                }
+
                 domain = domain_for_device(dev);
 
                 /* allocate a protection domain if a device is added */
@@ -2271,10 +2283,7 @@ static int device_change_notifier(struct notifier_block *nb,
 
                 dev_data = get_dev_data(dev);
 
-                if (!dev_data->passthrough)
-                        dev->archdata.dma_ops = &amd_iommu_dma_ops;
-                else
-                        dev->archdata.dma_ops = &nommu_dma_ops;
+                dev->archdata.dma_ops = &amd_iommu_dma_ops;
 
                 break;
         case BUS_NOTIFY_DEL_DEVICE: